On the coding-spreading trade-off in downlink and uplink MC-CDMA systems

Author

Bisaglia, Paola ; Benvenuto, Nevio

Author_Institution

Dipt. di Ingegneria dell´´Informazione, Padova Univ., Italy

Volume

7

fYear

2004

fDate

26-29 Sept. 2004

Firstpage

4903

Abstract

In this paper the trade-off between coding and spreading is investigated in the framework of a MC-CDMA system, whose physical layer parameters are derived from the wireless LAN (WLAN) HIPERLAN/2 (or IEEE 802.11a). For both downlink and uplink transmissions, the achievable bit rate is evaluated by considering several receiver structures, with code rate and spreading factor as parameters. Numerical results show that in the case of the minimum mean square error (MMSE) per-user detector with single-user soft decoder, the best code rate, for a target bit error rate, gives good performance as the spreading factor (and hence the number of users) increases. The scheme, with component blocks appropriately designed, could therefore be considered as a valid proposal for enhanced next generation WLAN.

Keywords

4G mobile communication; IEEE standards; code division multiple access; decoding; error correction codes; error statistics; least mean squares methods; radio receivers; spread spectrum communication; wireless LAN; HIPERLAN/2; IEEE 802.11a; MMSE per-user detector; bit error rate; code rate; coding-spreading trade-off; downlink MC-CDMA systems; enhanced next generation WLAN; minimum mean square error; performance; receiver structures; single-user soft decoder; spreading factor; uplink MC-CDMA systems; wireless LAN; Bit error rate; Bit rate; Decoding; Detectors; Downlink; Mean square error methods; Multicarrier code division multiple access; Physical layer; Proposals; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th

ISSN

1090-3038

Print_ISBN

0-7803-8521-7

Type

conf

DOI

10.1109/VETECF.2004.1405028

Filename

1405028